Corrosion inhibition effect of pyrazole derivatives on mild steel in hydrochloric acid solution
作者： Mahendra Yadav , Rajesh Ranjan Sinha , Tarun Kanti Sarkar , Nidhi Tiwari
DOI: 10.1080/01694243.2015.1040979
关键词:
摘要: Synthesized compounds, namely methyl 5-(4-Chlorobenzoyloxy)-1-phenyl-1H-pyrazole-3-carboxylate (MCPPC) and 5-(4-methoxyphenyl)-3-(4-methylphenyl)4,5-dihydro-1H-pyrazol-1-yl-(pyridin-4-yl)methanone (MMDPPM) were investigated as corrosion inhibitor for mild steel (MS) in 15% HCl solution using weight loss measurement, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) methods. Inhibition efficiency was found concentration-dependent increased by increasing the concentration of MCPPC MMDPPM. Both inhibitors efficient even at a very low 25 ppm. The MMDPPM showed inhibition 67.1 76.8%, respectively, 25 ppm, whereas it 92.0 95.9%, 250 ppm 303 K. polarization curves that act mixed-type solution. Nyquist plots charge transfer resistance double-layer capacitance decreased on i...
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